Written by Robert Khan and Tom Salinksy, KINGMAKER follows "a bumbling, charismatic London Mayor" who "challenges his enemies to become prime minister. But will his comic and colourful past destroy him?"

The play was directed by Hannah Eidinow at this year's Edinburgh Festival Fringe.

Cox starred opposite Laurence Olivier in the 1982 TV adaptation of John Mortimer's A Voyage Round My Father and is well known for his role in the 1985 film Young Sherlock Holmes. Cox has also appeared on Broadway in MTC's Translations in 2007, as well as The Seagull off-Broadway in 2013.